nvim: Upgrade vim-plug

Signed-off-by: Sanchayan Maity <maitysanchayan@gmail.com>

nvim/.local/share/nvim/site/autoload/plug.vim

@@ -942,6 +942,7 @@ function! s:do(pull, force, todo)
         endif
       elseif type == s:TYPE.funcref
         try
+          call s:load_plugin(spec)
           let status = installed ? 'installed' : (updated ? 'updated' : 'unchanged')
           call spec.do({ 'name': name, 'status': status, 'force': a:force })
         catch